Support multiple intersections for ray casting

[tucono]

Largely an update of PR #91303 (handling godotengine/godot-proposals#9059 and godotengine/godot-proposals#2616) to support Jolt Physics - however there are a few key differences.

This PR is to support multiple collisions for raycasts in 2D and 3D space provided by a new intersect_ray_multiple function. This function behaves somewhat similarly to the intersect_point methods which are provided a maximum number of allowable collisions. Once that number has been reached, the function will return (potentially not yielding all collisions along the raycast). However, if the maximum number of collisions provided is 1, then it will behave the same as the current intersect_ray method and return only the closest intersection.

The return is an unsorted array of dictionaries with the same parameters as the current intersect_ray methods. One curiosity I have seen between Jolt and Godot Physics is that Godot Physics only provides the closest hit on a convex mesh collision shape whereas Jolt provides all collisions where the normal is opposed to the raycast.

I've tried to do a good amount of testing with some simple documentation in the attached pdf. However, I doubt I have tested all possibilities since there are a large number of options for raycasts. I would highly welcome any additional testing.
Validation.pdf